The Princeton Review has released its annual free guide to the most environmentally responsible colleges. There’s something new added to this sixth edition: a ranking of the Top 50 Green Colleges out of the 353 on the comprehensive list. Leading the Top 50 list is Lewis & Clark College in Portland, Oregon. The school earned the top spot by generating 100 percent of its electricity from “green power” sources, reducing its greenhouse gas emissions by more than 30 percent, and supporting the Lewis & Clark Green Energy Institute to advance renewable energy policies.

Overall, the top 50 colleges on the new list demonstrate major commitments to sustainability. Among the group, 33 percent of food expenditures go to buy local and/or organic food. Eighty-one percent of new construction on campus is US Green Building Council LEED-certified. Ninety-six percent offer an undergraduate major or degree that is focused on sustainability. And 98 percent have a sustainability officer and sustainability committee.

Here’s the bottom line for colleges competing for future students: 61 percent of 10,000 teens surveyed said that having information about a school’s commitment to the environment would influence their decision to apply to or attend the college.